package demo1;
//这是测试学习接口的Computer类用来使用USB接口
public class Computer {
    public void powerOn(){
        System.out.println("打开电脑");
    }
    public void powerOff(){
        System.out.println("关闭电脑");
    }

    public void useDevice(IUSB usb){

        usb.openDevice();

        if (usb instanceof Mouse){
            Mouse mouse = (Mouse) usb;
            mouse.click();
        }else if (usb instanceof KeyBoard){
            KeyBoard keyBoard = (KeyBoard)usb;
            keyBoard.inPut();
        }
        usb.closeDevice();
    }
}
